Design and development of a 1:1 configuration snapshot channeled Stokes spectropolarimeter

Area of Science:

• Optical Physics
• Instrumental Science
• Polarimetry

Background:

• Stokes channeled spectropolarimeters are crucial for analyzing light polarization.
• Existing designs often use retarders with a 1:2 thickness ratio, posing limitations.
• Calibration typically relies on a fixed 22.5° linear polarization angle.

Purpose of the Study:

• To present a new Stokes channeled spectropolarimeter configuration with shared retarder thickness.
• To evaluate the performance of this new design against the standard configuration.
• To explore alternative calibration techniques and assess measurement accuracy.

Main Methods:

• Design and construction of a novel spectropolarimeter.
• Experimental measurements comparing the new configuration with the standard 1:2 ratio.
• Investigation of calibration methods using varied linear polarization angles.
• Evaluation of measurement accuracy with different light sources.

Main Results:

• The new configuration demonstrates comparable or improved performance.
• Alternative calibration approaches show viability.
• A method for calculating spectral resolution was developed and validated.

Conclusions:

• The novel spectropolarimeter design with identical retarder thicknesses is effective.
• Flexible calibration strategies enhance the instrument's utility.
• The developed spectral resolution calculation method simplifies instrument characterization.